Have a T34 1940 in the wings. Question on the base color. According to the Mig Russian Green pamphlet 4BO started be used in 41. Prior to it was a light green protective paint. Anybody have an idea which one would be more appropriate for a 1940 model? What time frame was the 1940 produced? (I have a KV1 that is a M1940 made in May/June 41. Not like auto Mfg...... 2020s will be out next week!!)